WCF4 and first class OAuth support

I haven't seen much mentioned about OAuth in these forums nor elsewhere around the web. So I am curious if you guys are working on anything for OAuth support?

I know there are a few solutions out there with DotNetOpenAuth or the Madgex opensource libraries and there was a way in the REST Starter kit with the Request Interceptor as Pablo Cibraro blogged about, but it seems this is a big piece missing from WCF to
be able to implement real world REST services.